Manual

 A Quick Start Guide to Fiber-to-the-Antenna (FTTA) Installation and Maintenance Testing
OTDR Testing During the Construction Phase
Testing Tx or Rx Fibers (no loopback)
During construction, a receive cable (10 – 20 m recommended) is placed at the top of a tower/rooftop, connected
to the RRU jumper, to allow the measurement of an entire link and the far-end connector loss and reflectance. A
non-reflective terminator or an APC connector is recommended to minimize the reflectance on the far connector.
A launch cable placed between the OTDR and the base station connector (10 – 20 m recommended) allows the loss
and reflectance of the base station connector to be measured.
Recommendations: overall loss should be <6 dB; reflectance per connector should be >–35 dB.
TEST
Test the remote end (at the JB or RRU at the top of
the tower):
. Inspect and, if necessary, clean connectors C and C.
. Inspect and, if necessary, clean the RRU jumper.
. Connect C to the RRU jumper using a bulkhead adapter.
. Wait for the end of OTDR acquisition from the BBU.
. After OTDR acquisition is complete, disconnect receive cable C.
. Inspect and, if necessary, clean the RRU port.
. Make the connection.
Test the local end (at the BBU at the bottom of
the tower)
. Inspect and, if necessary, clean connectors C and C.
. Inspect and, if necessary, clean the OTDR port.
. Connect C to the OTDR port.
. Inspect and, if necessary, clean the BBU jumper connector.
. Connect C to the BBU jumper using a bulkhead adapter.
. Launch OTDR acquisition.
. Check if results pass or fail (use schematic view).
. Save results and generate a certification report.
. Inspect and, if necessary, clean the BBU jumper connector.
. Make the connection.
Launch
cable C1
C1-2
DC
Receive cable C2
C2-1
C2-1
RRU
jumper
Distribution
boxes
C1-1
C